auto save

diy2.py

@@ -9,5 +9,5 @@ while True:
     if name!=username:
         print("用户名不存在,请重新输入:")
     if password!=userpassword:
-        print"密码有误,请重新输入:")
+        print("密码有误,请重新输入:")
 print("欢迎来到贝尔编程!")
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